Ueda Kentaro, Orii Yosuke, Takahashi Yoshinori, Okada George, Mori Yusuke, Yoshimura Masashi
Opt Express. 2016 Dec 26;24(26):30465-30473. doi: 10.1364/OE.24.030465.
We report third-harmonic generation (THG) at 355 nm in CsLiBO (CLBO) by using sum-frequency mixing process. As a fundamental laser source, we employ a hybrid master oscillator power amplifier (MOPA) system seeded by a gain-switched laser diode (GS-LD) at 1064 nm to produce narrow spectral picosecond pulses. Both CLBO and walk-off compensated prism-coupled CLBO device generate over 30-W output of 355-nm UV lights, which means walk-off effect in CLBO is negligible in the picosecond laser system. The maximum THG conversion efficiency from the fundamental reaches about 48%, which is 1.2 times higher than that of LiBO (LBO). Theoretical THG outputs with CLBO and LBO are numerically calculated in order to verify the validity of these experimental results in detail.
我们报道了通过和频混合过程在CsLiBO（CLBO）中产生355nm的三次谐波产生（THG）。作为基本激光源，我们采用了一个由1064nm增益开关激光二极管（GS-LD）注入种子的混合主振荡器功率放大器（MOPA）系统，以产生窄光谱皮秒脉冲。CLBO和走离补偿棱镜耦合CLBO器件都能产生超过30W的355nm紫外光输出，这意味着在皮秒激光系统中CLBO中的走离效应可以忽略不计。从基频光到三次谐波的最大转换效率达到约48%，比LiBO（LBO）高1.2倍。为了详细验证这些实验结果的有效性，对CLBO和LBO的理论三次谐波输出进行了数值计算。
